My parents died in a car accident, and I used my inheritance to score. The worst thing I've done is taking my best friends mothers credit card to withdraw cash from an ATM. That went on for about 2 months. I hit rock bottom when I realised I was homeless and had to stay in men's shelter for about 6 months until could find suitable accommodation. That men's shelter was filled with older men who were addicts of one sort or another. Seeing them helped me understand what my life could be.
It was a learning experience

After my parents died I just didn't give a fuck about anything. I had a death wish,. Whenn my "friend" came round and start smoking heroin he asked me if I wanted to try it. I did. That was the beginning.